KR100799723B1 - Epoxy resin composition for moving building site remained - Google Patents

Abstract

An epoxy resin composition for moving the remaining trace of an old building such as cultural properties is provided to improve storage stability for a long time and releasability. An epoxy resin composition comprises 100 wt% of a base which comprises 5-15 wt% of lauryl glycidyl ether, 1-5 wt% of 3-glycidoxypropyltrimethoxysilane, 5-10 wt% of trimethylolpropane polyglycidyl ether, 1-10 wt% of butadiene-acrylonitrile copolymer, 0.05-1 wt% of epichlorohydrin, and the balance of diglycidyl ether of bisphenol F; and 40-60 wt% of a curing agent which comprises 5-20 wt% of 1,4-bis(amino(cyclohexyl)methane), 2-10 wt% of 3,3-(oxybis-2,4-ethane-diyloxy)bis-1-propanamine, 5-10 wt% of a C18 unsaturated fatty acid dimer, 5-10 wt% of poly(oxy(methyl-1,2-ethanediyl)), 7-10 wt% of alpha-2-(2-aminomethylethyl)-Ћ-(2-aminomethylethoxy), 5-10 wt% of nonyl phenol, 10-15 wt% of 2,4,6-tri(dimethylamino)methyl phenol, and the balance of triethylene tetramine.

Description

Epoxy resin composition for moving building site remained}

1 is a schematic view for explaining the work before the yugu.

The present invention relates to an epoxy resin composition for yugwi only. More specifically, the present invention is particularly suitable before the yugu, and finally the resulting epoxy resin-like epoxy resin with a long-term storage stability excellent epoxy resin composition for long-term storage stability of the epoxy resin final product so that the urethane can be formed stably The present invention relates to an epoxy resin composition used to transfer a mortar using a resin and an epoxy resin.

In the excavation investigation to discover the relics, after retrieving the target relics, most of the places where the relics were placed will be reclaimed for preservation only. The site where this artifact was excavated is called Yugu, and there are various kinds of Yugu according to its size.

Yugu is a place of residence, small scales such as pottery, pottery, pottery, tombs, rituals, and temples. There are also large ones, such as the Holy Land.

In general, historical, archaeological and anthropological data obtained through excavation are divided into ancient and relics, which are used by several scholars in the field related to archaeologists engaged in excavation. Leaving this motel, they are stored in museums, military museums, or used as exhibition materials for the general public.

A more efficient way to use the data obtained through excavation is to locate the yugu and the remains at the same time.

In this way, when the yugu cannot be left with the relics or exhibited with the historical relics, the yugu is made in the same shape and moved to another place.

Not long ago, after the excavation was completed, the by-products left for us were limited to records, photographs and drawings of the yugu and the yugu created during the excavation process.

Based on this, explaining the excellence of our culture to the general public is difficult to understand easily even if attaching records, drawings, and photographs in this way. Doing.

In the 1980's, the study of preservation treatment in Korea began in earnest from the National Museum of Conservation Science and Conservation Science Laboratory of the National Institute of Cultural Heritage.

Since then, the transfer and restoration of the eternal sand using synthetic resin has been variously applied. Since then, museums have been opened in various regions, and various exhibition methods have been studied. Especially, in the process of obtaining the materials necessary for exhibition, preservation treatment and restoration of the physical quarters rather than models were continuously attempted.

However, in Japan, the developed country before the former period, urethane resin was applied on a certain type of Yugu like Korea and penetrated about 5mm (after penetration, about 8mm including surface thickness), dried it, and then peeled off. After the film was formed, work was carried out to form the final globules from epoxy resin.

This method, as shown in Figure 1, is common before the mouth of the urethane resin is the primary reason is that when working from the first transfer to the final resin, such as epoxy resin, dry time is slow and can not be folded and moved As the size and size of the resin cannot be moved, the flexible resin such as urethane resin is mainly used to remove the shape of the pentagonal (negative), and then to move it indoors using a crane, etc. After the epoxy resin was uniformly coated on the surface of about 5 cm and completely cured, the two layers were peeled off, and the surface formed in the shape of a negative was again formed in the shape of a circular shape. It will be displayed as a previous exhibit or stored as a ruin.

The following is the process of earthquake transcription currently being carried out by the Nara Cultural Heritage Research Institute of Japan. This is the most common method in which the use of epoxy resins and urethane resins in China and Korea has been handed down to cultural heritage preservation and former people.

(1) transcription layer arrangement

Clean up the soil transfer section to be removed and spray dry water on the soil.

(2) 1st resin map cloth

Instead of spreading the brush on to apply the modified polyurethane resin, apply a lot of resin and lightly press it with the brush so that the brush does not bite off.

(3) with gauze

It is attached when the resin stretches by 2 to 3 mm due to the viscosity when the hand is touched and released when the timing is important. In addition, gauze should not be pulled and attached slowly by pressing with a margin in order to get close to the uneven part, and then beat it several times with the palm.

(4) Second Resin Mappo

Bubbles are generated between the gauze and the soil layer during the second coating, so only the gauze can be removed later when removing it.

(5) release

When the modified urethane resin is cured, it is preferable to remove it from the bottom, but if there are a lot of stones on the transfer surface, remove it while pressing to prevent the surface from lifting from the top, and work slowly because it may be torn.

(6) drying

Drying shrinks and deforms when dried in sunny places, so dry in the shade and clean up the transferred soil layer.

(7) Preparation of Epoxy Resin Layer

Epoxy resin is applied two or more times on the soil layer, and then gauze and the like are attached again thereon. Then, epoxy resin is dried and dried once, and then the urethane resin and the epoxy resin are peeled off to prepare a final product.

As described above, the requirements of the transfer material for the transfer of yugu are as follows.

First, the use of transfer material that does not damage the original,

Second, there should be no change during the transfer and no change after the transfer.

Third, when peeling between urethane resin and epoxy resin, there should be no breakdown of epoxy resin and complete peeling should be made.

Therefore, the situation is required to develop an epoxy resin composition having the requirements of the transfer material as described above.

An object of the present invention is to provide a special epoxy resin composition for yugwi, which is particularly suitable before the ball, and the transfer material is excellent in long-term storage stability, it is possible to completely and stable peeling when peeling between urethane resin-epoxy resin to transfer a stable ball Provided is a epoxy resin composition.

As described above, the epoxy resin composition for yugui according to the present invention for achieving the object of the present invention,

5 to 15% by weight of lauryl glycidyl ether, 1 to 5% by weight of 3-glycidoxypropyl trimethoxysilane, trimethylolpropane polyglycidyle ether) 5 to 10% by weight, butadiene acrylonitrile copolymer (CTBN) 1 to 10% by weight, 0.05 to 1% by weight of epichlorohydrine and the remaining amount of diglycidyl ether of bisphenol F (diglycidyl ether of bisphenol F) further comprises a hardening agent in an amount of 40 to 60% by weight relative to 100% by weight of the subject consisting of a residual amount, wherein the hardening agent is 1,4-bis (amino ( Cyclohexyl) methane) (1,4-bis (amino (cyclohexyl) methane) 5-20 wt%, 3,3- (oxybis-2,4-ethane-diyloxy) bis-1-propanamine (3 , 3- (oxybis-2,1-ethane-diyloxy) bis-1-propanamine) 2-10 wt%, carbon 5 to 10 wt% of Fatty acid C18-unsat.dimers polymers, poly (oxy (methyl-1,2-ethanediyl)) 5-10 wt%, alpha-2- (2-aminomethylethyl) omega- (2-aminomethylethoxy) (alpha-2- (2-aminomethylethyl) omega- (2-aminomethyl ethoxy)) 7-10 wt% %, Nonyl phenol 5 to 10% by weight, 2,4,6-tri (dimethylamino) methyl phenol (2,4,6-tri (dimethylamino) methyl phenol) to 10 to 15% by weight and the balance as a tree It consists of ethylene tetraamine (triethylene tetraamine).

The lauryl glycidyl ether is mixed with other components in the composition in the composition to perform the function of adjusting the stretch rate, when included in less than 5% by weight, the stretch rate is small, the resin is broken when peeling On the contrary, if it exceeds 15% by weight, the elasticity ratio is too large to preserve the shape, it may be difficult to preserve the circular shape later.

The 3-glycidoxypropyltrimethoxysilane serves to control the strength in the composition, when included in less than 1% by weight, there may be a problem that the strength is lowered, on the contrary more than 5% by weight In this case, the strength becomes too strong, which may cause a problem of breaking during peeling.

The trimethylolpropanepolyglycidyl ether is also carried out in the composition to control the stretch rate, if included in less than 5% by weight, may exhibit a problem of peeling due to the stretch-free resin, on the contrary 10% by weight If it exceeds, it may show a problem in the degree of adhesion may show a problem over time to bond the soil.

The butadiene acrylonitrile copolymer is mixed with the compositions in the composition to perform the function of stability, if included in less than 1% by weight, there may be a problem in the stability after bending, on the contrary more than 10% by weight In this case, there may be a problem in strength.

The epichlorohydrin serves to prepare a stable resin by reacting the unreacted substances in the composition, and when included in less than 0.05% by weight, the addition amount is too weak to solve this problem if there is any unreacted On the contrary, if it exceeds 1% by weight, this material may show a problem of lowering strength.

The diglycidyl ether of the bisphenol F performs excellent viscosity and adhesion control in the composition and can exhibit excellent results up to fast drying.

The composition of the curing agent in the above is formulated to have a low viscosity and high elasticity for obtaining the optimum curing properties and ultimately the desired epoxy resin composition for Yugu for the subject having the composition described above.

Epoxy resin composition for yugwi according to the present invention having the configuration as described above is particularly suitable for yugwi, as shown in the following examples, having proper physical properties before yugu.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described.

The following examples are intended to illustrate the invention and should not be understood as limiting the scope of the invention.

Comparative example

Imported epoxy resins (NR 51, Japan), which are used worldwide, have a specific gravity of 1.34 and 0.97 of the main agent, and have a viscosity of 5,000 centipoise (25 ℃), adhesive tensile strength of 110㎏ / ㎠, and self tensile strength of 20 Kg / cm <2> is shown. Compared with conventional general epoxy resin adhesive, it shows considerably lower strength. If strength is improved, it is hard to peel epoxy resin from primary transferred urethane resin, so it is not peeled off or is formed in the form of flakes during peeling. Since is not preserved, an epoxy resin adjusted to have low adhesion is used. However, this is also a situation in which the complete peeling does not occur in Japan, and after transferring it, a number of manpower is used for about a year to peel the urethane resin on the surface of the epoxy resin using dental tweezers.

Example  1 to 5

As shown in Table 1, by using a high-viscosity and low-viscosity high-strength curing agent, epoxy resins for permanent transfer were prepared by varying the mixing amount of the curing agent, and they were measured by measuring their adhesive tensile strength and their own tensile strength. They measured their ability to bond the soil and their stability as a final product before the end of the future, and predicted their workability by measuring the dry and dry velocity, and using the measured surface hardnesses to predict the elongation, repulsion, and flexural strength they will show. And the results are shown in Table 1 below.

In the following,% means% by weight unless otherwise specified.

In Table 1, the main body and the curing agent were each made of 100% by weight, and then mixed while varying the amount (% by weight) of the curing agent with respect to 100% by weight of the main body.

Motif (wt%) Hardener Surface hardness Adhesive seal Self-tension Diglycidyl ether of bisphenol F (64.2%) lauryl glycidyl ether (13% by weight) 3-glycidoxypropyltrimethoxysilane (4% by weight) trimethylolpropanepolyglycidyl ether (9% by weight ) Butadiene acrylonitrile copolymer (9 wt%) Epichlorohydrin (0.8 wt%) 40 A97, D59 305 189 45 A97, D59 305 190 50 A97, D59 303 200 55 A95, D57 290 197 60 A90, D53 270 193  subject ; Specific gravity 1.10, viscosity 22000 centipoise (cps) curing agent; Specific gravity 1.10, viscosity 1000 centipoise

The composition and physical properties of the epoxy resin of the embodiment of the present invention are shown in Table 1 above.

These are the form of using a low viscosity hardener of the same specific gravity in the high viscosity theme with a specific gravity of 1.10 and a viscosity of 22,000 centipoise, and the most stable self tensile strength and adhesive tensile strength when 50% by weight of the curing agent is used based on 100% by weight of the base. (200 kg / cm 2 itself, adhesion | attachment 303 kg / cm <2>).

Surface hardness is about 97 based on Shore hardness type A, about 59 based on type D, and the palpation hardening time is very fast within 1 hour. After curing, it shows excellent results in flexibility, which is stable in both repulsion and elongation, and shows perfect and fast resilience even in surface cracking and 90 ° bending tests. The inclusion rate of the internal filler is also possible to fill more than 50% by volume, it is judged that there is no problem in the production of the peelable epoxy resin. By weight percentage, up to 70% of talc can be filled and up to 60% of hydroxy magnesium aluminum silicate can be filled.

Experimental Example

Epoxy Resin Urethane resin Peeling degree  durability

After the first transfer using the urethane resin (NS-10, Japan, coating film), after the complete epoxy resin film is prepared using NR-51 (Nara, Japan), peeling method is currently used in Korea in general It is now used to transfer the yugu by using it, and after the removal of urethane resin that has not been peeled off for a long time using dental tweezers as described above, but when using the currently developed epoxy resin, the separation completely occurs before the yugu. It seems to be the most stable and proper composition.

Due to the fast curing rate and elongation rate of the curing agent, there is no breakdown of epoxy resin during peeling, and the complete curing proceeds before penetrating into the urethane resin. It seems to be a result with resilience.

In addition, it does not penetrate the urethane resin due to the proper viscosity of the additives in the composition, it is peeled off by adhering only soil on the surface, and has a viscosity that does not cause problems in workability.

This is because one of the two layers breaks during peeling, or a rapid change in temperature as a result of the tension of the peeling, the self tension is reduced immediately (40 ℃ ↔ 0 ℃), or there is no partial crack (crack) phenomenon, especially In addition, the flexibility of the epoxy resin does not only affect the peeling, but also remains a factor of great stability even after peeling with temperature change or time change of the ball.

This is not a numerical result that can be calculated collectively, but rather a combination of ambient temperature, humidity, problems with the peeling surface, the size of the peeling particles, the viscosity of the epoxy resin, the flexibility of the epoxy resin, and the curing speed of the epoxy resin. As a result, the epoxy resin composition according to the present invention improved the flexibility at the time of peeling, urethane resin by increasing the viscosity by using talc (Talc) and hydroxy magnesium aluminum silicate (Hydroxy magnesium aluminum silicate) Epoxy resin compositions for stable transfer of petroleum were prepared by using less epoxy resin to the surface or a method of reducing permeability with a fast curing time.

In addition, the epoxy resin was used to reduce the breakage during peeling by using a high elongation curing agent, to improve the durability after peeling to maintain a stable peeling phase over time, and stability under UV light that changes over time is commercially available Compared with the changes of the epoxy resins, the chromaticity of the hydroxymagnesium silicate contained in the epoxy resin and the UV discoloration prevention phenomenon were almost unchanged.

In addition, the prepared epoxy resin was prepared in the form similar to the color of the soil, it could be confirmed that no significant problem occurs when the final epoxy resin exposure.

Therefore, according to the present invention, there is an effect of providing a resin composition for pre-gut, which is particularly suitable for pre-gut, and has excellent long-term storage stability and stable peeling during pre-molecular transfer.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

Claims (1)

5 to 15% by weight of lauryl glycidyl ether, 1 to 5% by weight of 3-glycidoxypropyltrimethoxysilane, 5 to 10% by weight of trimethylolpropanepolyglycidyl ether, 1 to 1 butadiene acrylonitrile copolymer 10% by weight, 0.05 to 1% by weight of epichlorohydrin and the remaining amount, further comprising a hardener in an amount of 40 to 60% by weight based on 100% by weight of the main composition comprising diglycidyl ether of bisphenol F. Wherein the curing agent is 5 to 20% by weight of 1,4-bis (amino (cyclohexyl) methane), 3,3- (oxybis-2,4-ethane-diyloxy) bis-1-propanamine 2 to 10% by weight, 5 to 10% by weight of unsaturated fatty acid dimers having 18 carbon atoms, 5 to 10% by weight of poly (oxy (methyl-1,2-ethanediyl)), alpha-2- (2-aminomethylethyl) 7-10% by weight of omega- (2-aminomethylethoxy), 5-10% by weight of nonylphenol, 2,4,6-tri (dimethylamino) methylphenol Epoxy resin composition for yugyeo, comprising 10 to 15% by weight and the remaining amount triethylenetetraamine.

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